Methods and devices for early SYNC for mobility
By exchanging early sync information and TA between RAN nodes, the method addresses the challenge of efficient LTM, reducing handover delays and enhancing mobility efficiency in wireless communication systems.
WO2026118320A1PCT designated stage Publication Date: 2026-06-11ZTE CORP
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- ZTE CORP
- Filing Date
- 2025-03-27
- Publication Date
- 2026-06-11
AI Technical Summary
⚠Technical Problem
Existing wireless communication systems face challenges in obtaining early sync information efficiently for layer 1/layer 2 triggered mobility (LTM), which hinders seamless handovers and increases latency in high-speed and low-latency scenarios.
⚗Method used
The method involves exchanging early sync information and timing advance (TA) between source and target radio access network (RAN) nodes to facilitate RACH-less LTM, enabling UE to synchronize with candidate cells before handover, thereby reducing handover delays and improving mobility efficiency.
🎯Benefits of technology
This approach enhances mobility efficiency by minimizing handover delays and signaling overhead, ensuring seamless transitions in high-speed environments, and improving overall user experience.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN2025085373_11062026_PF_FP_ABST
Abstract
The present disclosure describes methods, system, and devices for early sync for mobility in a mobile communication system. One method includes sending, by a source radio access network (RAN) node to a target RAN node, a request message for requesting early sync information for at least one candidate serving node; receiving, by the source RAN node from the target RAN node, a response message comprising the early sync information for the at least one candidate serving node; and receiving, by the source RAN node from the target RAN node, a timing advance (TA) information for the at least one candidate serving node, wherein the TA information is determined by the target RAN node.
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